package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.ReportMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class ReportServiceImpl implements ReportService {

    @Autowired
    private ReportMapper reportMapper;

    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WorkspaceService workspaceService;

    /**
     * 根据时间区间统计营业额
     *
     * @param begin
     * @param end
     * @return
     */
    @Override
    public TurnoverReportVO turnoverStatistics(LocalDate begin, LocalDate end) {
        // 当前集合用于存放从begin到end范围内的每天的日期
        ArrayList<LocalDate> dateList = new ArrayList<>();

        dateList.add(begin);

        while (!begin.equals(end)) {
            // 日期计算，计算指定日期的后一天对应的日期
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        // 将日期逗号拼接转成String
        String dateString = StringUtils.join(dateList, ",");

        // 存放每天的营业额
        List<Double> turnoverList = new ArrayList<>();
        for (LocalDate date : dateList) {
            // 查询date日期对应的营业额数据，营业额是指:状态为"已完成"的订单金额合计
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            // select sum(amount) from orders where status=5 and order_time>beginTime and end_time>order_time
            Map map = new HashMap();
            map.put("begin", beginTime);
            map.put("end", endTime);
            map.put("status", Orders.COMPLETED);
            Double turnover = orderMapper.sumByMap(map);
            turnover = turnover == null ? 0.0 : turnover;
            turnoverList.add(turnover);
        }

        // 将营业额进行逗号拼接转成string
        String turnString = StringUtils.join(turnoverList, ",");

        TurnoverReportVO turnoverReportVo = new TurnoverReportVO().builder()
                .dateList(dateString)
                .turnoverList(turnString)
                .build();

        return turnoverReportVo;
    }

    /**
     * 统计指定时间区域内的用户数据
     *
     * @param begin
     * @param end
     * @return
     */
    @Override
    public UserReportVO userStatistics(LocalDate begin, LocalDate end) {
        // 当前集合用于存放从begin到end范围内的每天的日期
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);

        while (!begin.equals(end)) {
            // 日期计算，计算指定日期的后一天对应的日期
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        // 将日期进行逗号拼接转成String
        String dateString = StringUtils.join(dateList, ",");

        // 存放每天的新增用户数量
        List<Integer> newUserList = new ArrayList<>();
        // 存放每天的用户总量
        List<Integer> totalUserList = new ArrayList<>();
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();
            map.put("begin", beginTime);
            // select count(id) from user where create_time>beginTime
            // 总用户数量
            Integer userTotal = userMapper.countByMap(map);
            // select count(id) from user where create_time>beginTime and create_time<endTime
            map.put("end", endTime);
            // 新增用户数量
            Integer userCount = userMapper.countByMap(map);
            userCount = userCount == null ? 0 : userCount;
            userTotal = userTotal == null ? 0 : userTotal;
            newUserList.add(userCount);
            newUserList.add(userTotal);
        }

        // 将用户数量和总量进行逗号拼接转成String
        String newUserString = StringUtils.join(newUserList, ",");
        String totalUserString = StringUtils.join(totalUserList, ",");

        UserReportVO userReportVo = new UserReportVO().builder()
                .dateList(dateString)
                .newUserList(newUserString)
                .totalUserList(totalUserString)
                .build();

        return userReportVo;
    }

    /**
     * 统计指定时间区域内的订单数据
     *
     * @param begin
     * @param end
     * @return
     */
    @Override
    public OrderReportVO ordersStatistics(LocalDate begin, LocalDate end) {
        // 当前集合用于存放从begin到end范围内的每天的日期
        List<LocalDate> dateList = new ArrayList<>();

        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        // 统计每天的订单数
        List<Integer> orderCountList = new ArrayList<>();
        // 统计每天的有效订单数
        List<Integer> validOrderCountList = new ArrayList<>();

        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            //select count(id) from order where order_time>beginTime and order_time<endTime
            // 每日订单数
            Integer orderCount = getOrderCount(beginTime, endTime, null);
            orderCount = orderCount == null ? 0 : orderCount;
            orderCountList.add(orderCount);
            //select count(id) from order where order_time>beginTime and order_time<endTime and status=5
            // 每日有效订单数
            Integer validCount = getOrderCount(beginTime, endTime, Orders.COMPLETED);
            validCount = validCount == null ? 0 : validCount;
            validOrderCountList.add(validCount);
        }

        //计算时间区域内的订单总数量
        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();
        //计算时间区域内的有效订单总数量
        Integer validOrderCount = validOrderCountList.stream().reduce(Integer::sum).get();
        //订单完成率=有效订单/订单总数
        Double orderCompletionRate = 0.0;
        if (totalOrderCount != 0) {
            //计算订单完成率
            orderCompletionRate = validOrderCount.doubleValue() / totalOrderCount;
        }

        // 将日期进行逗号拼接转成String
        String dateString = StringUtils.join(dateList, ",");
        // 将每日订单数和有效订单数进行逗号拼接转成String
        String orderString = StringUtils.join(orderCountList, ",");
        String validOrderString = StringUtils.join(validOrderCountList, ",");

        OrderReportVO orderReportVo = new OrderReportVO().builder()
                .dateList(dateString)
                .orderCountList(orderString)
                .validOrderCountList(validOrderString)
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();

        return orderReportVo;
    }

    /**
     * 销量排名前10统计
     *
     * @param begin
     * @param end
     * @return
     */
    @Override
    public SalesTop10ReportVO top10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
        List<GoodsSalesDTO> goodsSalesDTOS = reportMapper.getSalesTop10(beginTime, endTime);

        List<String> nameList = goodsSalesDTOS.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String nameString = StringUtils.join(nameList, ",");
        List<Integer> numbersList = goodsSalesDTOS.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String numberString = StringUtils.join(numbersList, ",");

        SalesTop10ReportVO salesTop10ReportVo = new SalesTop10ReportVO().builder()
                .nameList(nameString)
                .numberList(numberString).build();

        return salesTop10ReportVo;
    }

    /**
     * 导出近30天的运营数据报表
     *
     * @param response
     */
    @Override
    public void exportBusinessData(HttpServletResponse response) {
        // 1.查询数据库，获取营业数据--查询最近30天的运营数据
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd = LocalDate.now().minusDays(1);
        // 查询概览数据
        BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));
        // 2.通过POI将数据写入到Excel文件中
        // 获取模版文件
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
        try {
            //基于提供好的模板文件创建一个新的Excel表格对象
            XSSFWorkbook excel = new XSSFWorkbook(in);
            // 获取表格文件的sheet标签页
            XSSFSheet sheet = excel.getSheet("Sheet1");
            // 填充数据--时间
            sheet.getRow(1).getCell(1).setCellValue("时间:"+dateBegin+"至"+dateEnd);
            // 获得第四行
            XSSFRow row = sheet.getRow(3);
            row.getCell(2).setCellValue(businessData.getTurnover());
            row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessData.getNewUsers());
            // 获得第五行
            row=sheet.getRow(4);
            row.getCell(2).setCellValue(businessData.getValidOrderCount());
            row.getCell(4).setCellValue(businessData.getUnitPrice());

            // 填充明细数据
            for (int i = 0; i < 30; i++) {
                LocalDate date = dateBegin.plusDays(i);
                BusinessDataVO businessData1 = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData1.getTurnover());
                row.getCell(3).setCellValue(businessData1.getValidOrderCount());
                row.getCell(4).setCellValue(businessData1.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData1.getUnitPrice());
                row.getCell(6).setCellValue(businessData1.getNewUsers());
            }

            // 3.通过输出流将Excel文件下载到客户端浏览器
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);

            // 4.关闭资源
            excel.close();
            out.close();
        } catch (IOException e) {
            e.printStackTrace();
        }



    }

    /**
     * 根据条件统计订单数量
     *
     * @param begin
     * @param end
     * @param status
     * @return
     */
    public Integer getOrderCount(LocalDateTime begin, LocalDateTime end, Integer status) {
        Map map = new HashMap();
        map.put("begin", begin);
        map.put("end", end);
        map.put("status", status);
        Integer orderCount = orderMapper.getOrderCount(map);
        return orderCount;
    }
}
